In Gaelic times, Ireland was broken into four distinct provinces. Ulster (the North), Munster (the South), Leinster (the East) and Connaught (the West). Each had its own flag.
The map of Ireland is also broken into four distinct geographic sections.
Each part of Ireland has a distinct verbal dialect although in recent times people move more freely about the country and you can find these accents everywhere!
Northern dialect is largely influenced by Scots English
Eastern Ireland historically has a deeper Dublin dialect
Southern Ireland is musical and expressive
Western dialect, the 'traditional Irish' accent portrayed in many Studio based American movies.